What was found
(CAN) ON GEAR UP SELECTION AFTER TAKEOFF, A LOUD BANG WAS HEARD. THE AIRCRAFT CONTINUED AND AFTER GEAR DOWN SELECTION, THE R/H MAIN GEAR FAILED TO INDICATE LOCKED. AIRCRAFT LANDED WITHOUT INCIDENT. IT APPEARED THAT TORQUE TUBE MAY HAVE BEEN CRACKED PREVIOUSLY AT ATTACH POINT FOR THE OPERATING ROD. A FLEET INSPECTION WAS COMPLETED WITH NO OTHER DEFECTS NOTED. PART IS INSPECTED AT EACH #3 CHECK EVERY 200 HOURS.